[Elecraft] [K3] CW decode not working
I just finished assembling my new K3 s/n 1113. Now playing with it and trying out some features. The firmware is 2.02. I tried CW text decode function, setting it up as shown om P. 31 in the manual. I get no decoded text on the display. Also tried RTTY decode. AFSK A and also no decoded text. What do I do wrong? 73, Matti -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: [K3] CW decode not working, solved
Sri, I forgot to tap the DISP, button. Now all is working correctly. Very foolish of me... :-( 73, Matti Sri, abt the wasted BW On Sat, Jun 28, 2008 at 04:18:48PM +, tf3ma wrote: I just finished assembling my new K3 s/n 1113. Now playing with it and trying out some features. The firmware is 2.02. I tried CW text decode function, setting it up as shown om P. 31 in the manual. I get no decoded text on the display. Also tried RTTY decode. AFSK A and also no decoded text. What do I do wrong? 73, Matti -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] CW Secrets of the Masters
Disclamer: I am a very bad CW operator :-( But I discovered that my K2, had a rather limited low freq audio response. So I took a look at the schematic for the audio circuit in the K2... The original low freq. cutoff (-3db) freq. is approx. 640Hz (with KAF or DSP moduls installed) or 400Hz (with no audio moduls) determined by C25, C26 and the 5kOhm volume control (and NE612 mixer impedance), to extend the audio frequency response for the low freq. I put 0.1uF SMD across C25 and C26, extending the low frequency response to approx. 320Hz. This improves the SSB sound of the receiver, and improves SNR when copying low pitch CW signals. This simple mod increases the rx audio signal at 300 Hz by about 3dB. This could help those copying low pitch CW signals. just my $ .02... 73, Matti, TF3MA -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Separate list for K3
Hi If you feel that the list is out of hands, then do as I did long ago, unsubscribe and just read the MARC list archives, subjects are neatly sorted and grouped. No clogging of your Mail inbox. To post to the list, just make an entry for elecraft@mailman.qth.net in you address book or whatever you use, and cut and paste the subject ... 73, Matti -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 SSB adjustment
All K2'ers When aligning SSB filters be ware of the low freq cutoff in the audio chain if you are measuring across the loudspeaker terminals. The original RX audio low freq. cutoff (-3db) freq. is approx. 640Hz (with KAF or DSP moduls installed) or 400Hz (with no audio moduls). The cutoff is determined by C25, C26 (on the control board) and the 5kOhm volume control pot (and NE612 mixer output impedance with no audio moduls), C25 and C26 are 0.1uF each and in series with the vol pot which is 5k. This is a high pass filter with abt 640Hz cutoff. So if you are using Spectrogram og Baudline to adjust the low freq points, you will not get the correct setting if you do not know this. To improve the RX low freq range you should change C25 and C26 to 0.22 or 0.33 uF. This affects only the RX audio, and it makes the SSB sound better. In my K2 I put 0.1uF SMD's across C25 and C26, extending the low frequency response to approx. 320Hz. It also helps with SNR when copying low pitch CW signals. just my $.02 73, TF3MA, Matti K2 #2024 -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 -- RX audio
Hi While trying to improve the K2 RX audio response specially for SSB, I noticed lack of low frequencies, looking at the schematics I find the the LP cutoff is abt 640 Hz, determined by C25, C26 and the 5k vol pot ( this is wheather using DSP or not). By increasing C25 and C26 to 0.2uF (from 0.1uF) the LP cutoff is moved to abt 320 Hz. This makes better sounding SSB signals and also helps in CW mode when copying low pitch signals. To lower the LP cutoff, I soldered 0.1uF SMD caps across C25 and C26 on the control board. To my ears K2 now sounds better. 73, Matti ps. I use 2.4 kHz X-Tal filter -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Sherwood report and K3 agc
Hi If K2 sounds better than most modern rigs, then listen to the soundfiles on http://www.qslnet.de/member/df7tv/nc2030pn.html and compare the sounds of NC2030 and K2, in my opinion the NC2030 is far superior sounding under these conditions, compared to K2, judging from these recordings. 73, Matti -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] spectrogram for mac or linux?
Top class software Baudline is a time-frequency browser designed for scientific visualization of the spectral domain. Signal analysis is performed by Fourier, correlation, and raster transforms that create colorful spectrograms with vibrant detail. Conduct test and measurement experiments with the built in function generator, or play back audio files with a multitude of effects and filters. The baudline signal analyzer combines fast digital signal processing, versatile high speed displays, and continuous capture tools for hunting down and studying elusive signal characteristics. http://www.baudline.com/ Linux, FreeBSD, or Solaris operating system x86, x86_64, PPC, S/390, or SPARC CPU architecture X11 server display 73, Matti Disclamer: I am just a happy user of Baudline here is an example of freq response of my K2 filter, using Baudline an Gnuplot. http://www.raunvis.hi.is/~matti/TF3MA/lsb_usb.png -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 - How good on SSB?
SSB ... No problem..
I got my K2 in the middle of 2001, KPA100 in late 2002,
now mostly use SSB and 100W, (after mars 2005 sometimes 1kW)
Antennas dipole, vertical
Results:
QSO's: 6181 From {17 Feb 2001} to {11 Mar 2007}
Countries: 219, SSB: 208, CW: 123
Now I use the 2.4kHz SSB filter,
No problem using qrp, 15w during the first years, specially on the high
bands. Now as we are in the bottom of the sunspot cycle,
I have to use the kW linear, specially on 40 and 80
73, Matti
--
Marteinn SverrissonTF3MA
Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is
270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma
Iceland
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RE: [Elecraft] Re: MFJ259
As Don indicated, one can use indirect measurements to measure the R and X components of an antenna, If you have a KAT100, you already have all what is needed to make a good antenna analyzer. Just push TUNE and let the KAT100 find a match, then read out the L and C values from the KAT. I have not worked out how to read out the L and C from the KAT100, but it should be easy to make a simple program which reads them and the frequency and displays the actual R and X, with sign. I have used the KAT100 to measure the SWR of an antenna, just connect a 50 Ohm dummy load and push TUNE, then connect the antenna, and set the output level to 1 og 2 Watts, and key the K2 in CW mode, the SWR leads will show the antenna SWR (the range from 1:1 to 1:5), just my $0.02 73 Matti -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Re: MFJ259
I read the KAT100 manual :-) This is how you do: Push TUNE and let the KAT100 find a good tune, preferable 1:1. To read the L, C and NET( Cin/Cout) just push MENU and select ATU, then scroll until you see Lxx.x uH and Cx.xx pF and NETx 1=Cin, 2=Cout, note the frequency and you have all you need to work out the actual antenna parameters, well these are the complementary values, needed to get a 50 Ohm match. If you have a computer connected to your K2, it is trivial to make a small program which reads the ATU parameters and FREQ and calculates the actual R, X for the antenna. You can even let the program scan the band(s) (you can use CW on all bands, except 60m) and get a graph of the antenna parameters. But remember you can not transmit outside the hambands Possibly I will try this out, writing a small TCL program, but I have the VK5JST aerial analyzer which works well, it took only abt a week, to get the kit from VK land to TF, total cost incl post abt U$100. 73, matti -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KAT100 as antenna analyzer
Hi Regarding the use of KAT100 as an antenna analyzer: As you can read the L and C from the KAT100, and the configuration Cin/Cout, it should be easy to incorporate into the KAT100 software code routinges to calculate the actual R and X of the load/antenna. These could then be display via K2 ATU Menu. That is if there is place in the KAT100 PIC for more software I guess the Freq is already read in to KAT from the K2, so all the parameters should be there. This would of course not work if the KAT100 is connected via transmission line to the antenna, unless you know the length and impedance of the line and transform the results. 73 Matti ps. I made a simple TCL routine to read from the KAT100 on my K2, using the serial interface Used SWxx; commands to simulate pushing the menu button etc, FA to read the frequency. Here is the RAW output from FA and DS commands, and menu values: FREQ: FA3505580; 3505.580kHz SWR: [EMAIL PROTECTED]I; 1.1-1 L: [EMAIL PROTECTED]; L01.3uH C: [EMAIL PROTECTED]; C0.45pF NET: [EMAIL PROTECTED]; Cin -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Antenna Analyzer
Hi VK5JST Aerial Analyzer, covers up to 30MHz, a kit is abt $100. take a look at: http://www.users.on.net/~endsodds/analsr.htm 73, Matti -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] BFO oscillator level
I did some measurements on the BFO output level on my K2 #2024. On U11 pin 6, I measured LSB: 596mV RMS, USB: 727mV RMS, CW: 577mV RMS, using the RF probe and a DVM. There has always been some BFO leakage into the AGC circuit. When I adjust the S-meter LOW for 1 led lit on LSB, two leds will lit up on USB, (40m band), I suspect this is caused by some leakage from the BFO osc, beeing a little more on USB than on LSB. Is there a simple way to reduce (or equalize) the BFO osc level, say by half? It would still be within specs (see page 11 Appendix E, on manual) Best if the BFO level would not change when the BFO freq is changed. 73, de Matti -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: BFO oscillator level
Thanks Don and Jack for the info, Don, I did ground Xtals X3 and X4 at the base (they where grounded on the top), flush cut all leads on the mixer and if amp circuits. No change. Both LSB and USB lit 1 led when I turn the K2 on, and then after abt 5 min, then on USB the second led will turn on, but on LSB no change. Maybe this indicates a bad IC, either the mixer or if amp? Jack, I guess that not all K2 are born equal, as you mention the BFO leakage varying up to 10dB, between rigs. Probably some 602 and 1350 have better (higher) revese isolation than others. This BFO leakage is not a big issue for me, just a little annoying. thanks and 73, Matti -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Sidetone
Regaring the clicks. -Original Message- I am hesitant to put this question up here because I have seen so many posts about it but here goes anyway. I love my K2 sn 05834 except for one thing...the sidetone. There seems to be excessive thumps (clicks?) on both make and break, especially when using the internal speaker. I know there were alot of comments about the sine wave improvements, but has anyone been able to eleiminate or reduce significantly the thumps? Do the clicks disappear when the RF-gain is turned down? If so the clicks have nothing to do with the sidetone, but rather the muting circuit. This is my experience after the (tf3ma) sidetone mod. The muting circuit is cutting of the audio noise/signal abruptly creating the clicks, solution would be to smoothing the turn off/on of the muting fets (RC filter in the gate circuit). just my $0.02 73 and happy new year Matti -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KPA100 spurs
Hi I just installed a new X1 XTAL 18.432, as a part of upgrading the KPA100. I used components obtained locally. Stability of KPA100 is improved, at least it stopped oscillating on 17m band when I use SSB. But Now I find lots of spurs. Here is a list: 18.080, 21.415, 24.903, 24.984, 28.015, 28.260, 28.671, 29.314 these are definetly from X1 as the freq shifts when PA is turned on by setting the power 10w. Any suggestions 73, Matti -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] OP1 and CW filter gain difference?
Hi All I was measuring the gain difference of the OP1 x-tal filter and the CW filter on my K2. It seems that the OP1 filter has +10dB more gain than the CW filter I have the 2.5kHz OP1 filter mod and the stock CW filter on 2.4kHz. Measurements are done on 7 MHz band on LSB. I did the measurements with AGC off, using noise gen and audio spectrum analyzer. Is this normal? Should I look for some bad X-tals or varicaps in the CW filter? 73 de TF3MA PS. same results if I unmodule the KSB2, the gain is still low. -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] OP1 and CW filter gain difference, solved
Thanks all I checked T7, it is OK, so are the varcaps. My K2 seems OK I fiddled with the CW filter settings, changed the BW and it does indeed show the expected behavior, to much bandwidth 1kHz, to little bandwidth 200 Hz did show lower filter gain, so I just selected BWs which do not have as much attenuation of the signals as before, now the CW filter loss is abt 3 to 6dB rel to the OP1. I can live with that :-). 73 de TF3MA -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Linux
Hi Brian I only use Linux for my logging as I do not have Windows on my computers. For logging I wrote a small Tk/Tcl program which uses MySQL for storing the logbook. The program runs under X, I use KDE. I also have a serial connectin to my K2, so the program can read/control the Freq, Mode, etc of the K2, for more information and screenshoots, see: http://www.raunvis.hi.is/~matti/TF3MA/MALog.php the program is GPL'ed and is free to download for everyone. And I you know TCL/TK it is easy to modify the program to suit you needs. 73's Matti, TF3MA -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
